Energy storage power supply



FIG. 1 is a front perspective view of an energy storage power supply showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings depict portions of the energy storage power supply that form no part of the claimed design. 

CLAIM The ornamental design for an energy storage power supply, as shown and described. 